Look here:
Clocks and timers for PowerPoint
http://pptfaq.com/FAQ00081.htm

Signature
Geetesh Bajaj, Microsoft PowerPoint MVP
http://www.indezine.com
http://www.ppted.com
> I have pp 2003 and I would like to add time to the first slide of my show -
> I know how to add time by going to insert- etc - but this time will remain
> the same if I play presentation few hours later.
> I am looking for the time display which will synchronize with the PC clock.
> thank you